Both the Carlyle and the Dorian use a 3" flush valve and a 2 1/16" trapway.

The Carlyle has a higher tank, so the water drops from more height.
The Carlyle is considered a G-Max flush in Toto terms and the Dorian is a Power Gravity, which means it would be more like the Ultimate in the testing.
"Power Gravity" is a gravity system. It does have a 3" flush valve.

Performance with either would be good.

I doubt that either tank would sweat. Since the flush only uses 1.6 gallons and the tank holds much more than that, the water stays warmer.

If you're doing some remodeling, one way to prevent sweating of the toilet is to use a mixing valve that adds a little hot water. My guess is that with a pressure assist toilet, since the water is in a pressure tank housed within the ceramic tank, because water does not come in contact with the sides of the ceramic, then it doesn't sweat, at least to the outside! Since there isn't much air exchange inside the toilet, there isn't much moisture to have any condensation. Do you have a deep well? Thought about maybe a storage tank (in addition to the pressure tank) to let the water warm up a little bit? My unprofessional opinion!